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TitleGeology of the Paloproterozoic Piling Group and underlying Archean gneiss, central Baffin Island, Nunavut
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AuthorScott, D J; St-Onge, M R; Corrigan, D
SourceGeological Survey of Canada, Current Research (Online) no. 2002-C17, 2002, 10 pages, https://doi.org/10.4095/213194
Year2002
PublisherNatural Resources Canada
Documentserial
Lang.English
Mediapaper; on-line; digital
RelatedThis publication is contained in Geological Survey of Canada; Geological Survey of Canada; (2002). Current Research 2002, winter release, Geological Survey of Canada, Current Research no. 2002
File formatpdf (Adobe Acrobat Reader)
ProvinceNunavut
NTS37A; 27B
AreaBaffin Island
Lat/Long WENS-74.0000 -68.0000 69.0000 68.0000
Subjectsregional geology; tectonics; structural geology; economic geology; Archean; gneisses; orthogneisses; quartzites; psammites; bedrock geology; tectonic setting; turbidites; deformation; metamorphism; plutonic rocks; igneous rocks; mafic volcanic rocks; sedimentary rocks; carbonates; Piling Group; Rae Craton; Dewar Lakes Formation; Flint Lake Formation; Astarte River Formation; Longstaff Bluff Formation; Bravo Lake Formation; Cumberland Batholith; Franklin Diabase Dykes; Precambrian; Proterozoic
Illustrationssketch maps; photographs; schematic cross-sections
ProgramCentral Baffin Partnership Project, 1998-1999
Image
Released2002 02 15
AbstractNew mapping has refined the stratigraphic relationships within the Paleoproterozoic PilingGroup (NTS 37 A, 27 B), as well as its relationship to underlying Archean basement orthogneiss of the Rae Craton. Across the project area, basal quartzite and rare psammite (Dewar Lakes Formation) are in tectonic contact with underlying orthogneiss, and are interpreted as a subsidence-related clastic sheet deposited on Rae basement. In the northern part of the area, carbonate units (Flint Lake Formation) overlie the quartzite, and are overlain by sulphidic pelite and iron-formation (Astarte River Formation), interpreted as a shelf that subsequently foundered. In the south, quartzite is overlain by mafic volcanic rocks and ultramafic to mafic sills interlayered with siliciclastic rocks (Bravo Lake Formation). Psammite/ pelite turbidites (Longstaff Bluff Formation) blanket the entire area, and are interpreted as an orogenic molasse that might have had a source area other than the Rae Craton. Deformation and consequent metamorphism occurred during the1.8 Ga Trans-Hudson Orogeny.
GEOSCAN ID213194